Oidium

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oidium

[ō′id·ē·əm]
(mycology)
One of the small, thin-walled spores with flat ends produced by autofragmentation of the vegetative hyphae in certain Eumycetes.

Oidium

 

a small cell into which the hypha of the mycelium of certain imperfect and club fungi disintegrates. The oidium functions as a spore for vegetative reproduction. In heterothallic club fungi, the oidium performs the function of a spermatium in diploidization of the mycelium.